{"provider_name":"Hatena Blog","categories":[],"width":"100%","image_url":null,"url":"https://blog.kyanny.me/entry/2012/06/01/202952","type":"rich","author_url":"https://blog.hatena.ne.jp/a666666/","height":"190","blog_url":"https://blog.kyanny.me/","version":"1.0","author_name":"a666666","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kyanny.me%2Fentry%2F2012%2F06%2F01%2F202952\" title=\"Rails 3.2.5 and uniqueness validation failure problem - @kyanny&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","blog_title":"@kyanny's blog","description":"Rails 3.2.5 was released today. I tried to upgrade my application from 3.2.3 to 3.2.5, but I encountered uniqueness validation failure problem.This problem reported at #5853. I read the discussion of this issue. I'm about understood about this problem. I also read the commit, but, unfortunately, I c\u2026","title":"Rails 3.2.5 and uniqueness validation failure problem","published":"2012-06-01 20:29:52"}